Equipment are needed to observe a protocol so the interrupt-request (IRQ) traces is usually shared. The PCI bus consists of four interrupt strains, INTA# via INTD#, all of which can be obtained to every system. Around eight PCI products share the identical IRQ line (INTINA# by INTINH#) in APIC-enabled x86 https://nathanlabsadvisory.com/stay-safe-with-premium-penetration-testing-services-in-uae/